But the Labour Party has always been a loose coalition between the hardish left and the centre left. Those on either wing who couldn’t stomach it after a bit always had the Communists/SWP or the SDP/Libs to turn to. Of course some of the ‘hard’ left explicitly use the Labour Party through ‘entryism’ to insinuate their agenda into the mainstream, as they know they could never democratically achieve this standing for a fringe party. At least with Corbyn this is all more explicit and up front. But he has hamstrung himself by going on about ‘democracy’ in the party and insisting that policy is set by the members, 88% of whom want to remain in the EU. Which, as you rightly point out, is anathema to the true hard ‘socialism in one country’ left. Catch 22 for Corbyn, Milne and their cronys.
All this democracy forelock tugging is bullshit of course. The true hard left know that parliamentary democracy is a bourgeois con to be used to seize power and then dumped, believe they have historical inevitability on their side, soon they will be able to establish the dictatorship of the proletariat, purge their enemies and chant ‘four legs good, two legs bad’ endlessly while behaving exactly the same as the last generation of oppressors, except more so.
I fear the statist, authoritarian left just as much as the authoritarian right. Now the libertarian left, which is much lighter on doctrine and dogma, is another matter......